docs: def load_structure_path(self, structure_path, file_type):
          """Load a structure file and provide pointers to its location
  
          Args:
              structure_path (str): Path to structure file
              file_type (str): Type of structure file
  
          """
  
          if not file_type:
              raise ValueError('File type must be specified')
  
          self.file_type = file_type
          self.structure_dir = op.dirname(structure_path)
          self.structure_file = op.basename(structure_path)